commit aa162682ca23907d463635534b987b4defa22d24
author Nico Weber <nicolasweber@gmx.de> Sun Apr 21 14:25:07 2019 +0000
committer Nico Weber <nicolasweber@gmx.de> Sun Apr 21 14:25:07 2019 +0000
tree 07da61e91c01ead268bfe9abe96f3f716acc4e30
parent f985e3125428c41ec253f08d824ba00f7acb1320

llvm-undname: Fix stack overflow on invalid found by oss-fuzz

llvm-svn: 358852

llvm/lib/Demangle/MicrosoftDemangle.cpp

diff --git a/llvm/lib/Demangle/MicrosoftDemangle.cpp b/llvm/lib/Demangle/MicrosoftDemangle.cpp
index 6431e4a..b421f2a 100644
--- a/llvm/lib/Demangle/MicrosoftDemangle.cpp
+++ b/llvm/lib/Demangle/MicrosoftDemangle.cpp
@@ -1292,7 +1292,7 @@
 
     unsigned BytesDecoded = 0;
     while (!MangledName.consumeFront('@')) {
-      if (MangledName.size() < 1)
+      if (MangledName.size() < 1 || BytesDecoded >= MaxStringByteLength)
         goto StringLiteralError;
       StringBytes[BytesDecoded++] = demangleCharLiteral(MangledName);
     }